# e vs 费米扫描

The clearest difference is update cadence: e at every 3 months against 费米扫描's every 7 months. e also leads on iOS requirement (8.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

e ships an update every 3 months, 费米扫描 every 7 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | e | 费米扫描 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 7 months |
| Size | 46 MB | 13 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [深圳市众仪电测科技有限公司](https://appshunter.io/developer/1490956037) | [Shanghai Yunxiao Information Technology Company Limited](https://appshunter.io/developer/1785446567) |

## What reviewers say

### e

[App page](https://appshunter.io/ios/app/e-bull/id1490956038)

**Features:** macOS Compatibility

**In-app purchases:** none


### 费米扫描

[App page](https://appshunter.io/ios/app/id6739461027)

**In-app purchases:** none


## Frequently asked questions

### Is e free?

e is free to download, with no in-app purchases.

### Is 费米扫描 free?

费米扫描 is free to download, with no in-app purchases.

### Do e or 费米扫描 have ads?

Neither e nor 费米扫描 shows ads.

### Which is updated more often, e or 费米扫描?

e ships an update every 3 months, and 费米扫描 every 7 months. Most recently, e was updated on November 3, 2026 and 费米扫描 on October 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*